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LEVI W.1 I CND, 0F EAU CLAIRE, WISCONSIN, ASSICNOR To H/IMSLF ANb EAU CHAINE LUMBER COMPANY, CF SAMEQPLACE.

4Letters Partant No. 80,6G3,'datd Augustr'l, 1868. l

IMPROVD DEVICE PQR SHEERING BOOMS.

die Srkebultnfrrrh 1u iu their etters ntmt #um making mi ni the samt. i

TO ALL WHOM IT MAYfGONGERN: l

Be it known that I, LEVI W, POND, of Eau Claire, inthe county ot Eau Claire, and Stute of Wisconsin, have' invented a new and impro'ved` SlIeer-Ruddex' Boom; and I do hereby declare that the following is a. full, elem', and exact description thereof, which will enable others skilled inthe art'to qinke and use the sonne, reforone being had to the accompanying drawings forming'port oithis specification.

Figure 1 is a. view showing my improved s'heemtudder`\booni closed. Figure 2 is the same view, 'showing the boomopened. l y v, Figure 3 is an enlarged detail perspective view of u portion of the buoni. Similar letters of referen'cei'dieate corresponding ports'. 1 l My invention has for itsvbje'ctt'fnrnish :In impr-ordm which shall bo se constructed and arranged that it muy be held-inplace to stop the iionting, and opened and elosedwhen' required, by the yztetioh of the current of the stream, and it consists inthe combination of rudders with the boom,`the whole being constructed und arranged as hereinafter more fully described.

A is the boom, which muy be made in two or more parts securely hing d4 to euch other, as shown in figs. 1 und 2. The `shore-end of the boom A is. hinged or otherwise bivoted orsecured to a. spile or other firm supportupon the shore. l Y

To the down-stream side'oi the booxn A are-securely hinged or pivotod I'uddei'sv B, the number of which must depend upon the length of the boom and the force of the current.

The 'rudder B ofthe h'oon A, or 'rather the'rudders oi" each part or -piece of said boom, are connected to each other by connecting-rods or bars C, the ends of which are pivote'd to the adjacent sides of they contiguous ruddcrs as shown in thedruwings, so that all therudders thus connected together muy jalways move together, and be always held parallelwith each other. t j i I Dv is o windlns'ev or eupetan, placd upon or connected with the end of euch pallir piece of the boom A. l

E is n ropo, one end'o` which is uttchod to-the windlass or capstan'D, and the other .end ofI which is attached to the nearest rudder of that part or piece of'thebootn with which the sad windlass or` eapstan D isV connected.l i

By this construction, by operating `the` windluss or cpsthnD to' wind up or let out the rope E, thenmgle at which therudders B stand to the boom A Imuy be adjusted ns required, so thnt-the-foro of the current acting upon the snid rudders muy hold 'the said boom .in` its plane, open it topermit tho passage of boats, rafts, .und close it again, us required.

I Claim as new, und desire to secure by Letters Patent? v, v j The combination of the rudders B. with the boom A, whether said boom be made in one ormore ports .or pieces, substantially :is herein shown and described, and forthe purpose set forth.V i

The above specification of' my invention signed by me, this twenty-third day of Jlnusry, 1868.

f LEVI` W.y POND. 

